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Note 9 - Segment Information - Financial Information for the Company's Reportable Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Dec. 31, 2016
Net sales to external customers $ 82,428 $ 83,748 $ 250,285 $ 253,862  
Income before income taxes 2,164 2,796 4,143 1,825  
Capital expenditures, net 4,764 6,331 12,789 18,213  
Depreciation and amortization 4,201 3,954 12,084 11,573  
Total assets 184,341 182,897 184,341 182,897 $ 199,595
Retail [Member]          
Net sales to external customers 80,552 81,870 243,559 249,854  
Income before income taxes 1,098 1,881 1,493 429  
Capital expenditures, net 4,607 6,321 12,614 18,178  
Depreciation and amortization 4,185 3,935 12,034 11,506  
Total assets 176,159 174,510 176,159 174,510  
Commercial [Member]          
Net sales to external customers 1,304 1,322 5,037 2,601  
Income before income taxes 563 667 2,112 1,080  
Capital expenditures, net  
Depreciation and amortization 1 1 2 2  
Total assets 5,998 5,968 5,998 5,968  
International Franchising [Member]          
Net sales to external customers 572 556 1,689 1,407  
Income before income taxes 503 248 538 316  
Capital expenditures, net 157 10 175 35  
Depreciation and amortization 15 18 48 65  
Total assets $ 2,184 $ 2,419 $ 2,184 $ 2,419